[PATCH] net/mana: check for vendor_part_id when probing RDMA device

[longli at linuxonhyperv.com]

From: Long Li <longli at microsoft.com>

The RDMA kernel driver may expose two MANA RDMA devices, for RC and RAW
QP types. The purpose is to support fast service mode at SOC. Depending
on kernel version, the probe may fail if DPDK picks up the wrong device.

Add check for vendor_part_id and RAW QP capability when probing the MANA
device. This check is compatible with all kernel versions.

Fixes: 517ed6e2d590 ("net/mana: add basic driver with build environment")
Cc: stable at dpdk.org
Signed-off-by: Long Li <longli at microsoft.com>
---
 drivers/net/mana/mana.c | 14 ++++++++++++++
 drivers/net/mana/mana.h |  4 ++++
 2 files changed, 18 insertions(+)

diff --git a/drivers/net/mana/mana.c b/drivers/net/mana/mana.c
index 2934da29f7..c42a987a30 100644
--- a/drivers/net/mana/mana.c
+++ b/drivers/net/mana/mana.c
@@ -1490,6 +1490,20 @@ mana_pci_probe_mac(struct rte_pci_device *pci_dev,
 			continue;
 		}
 
+		if (dev_attr.orig_attr.vendor_part_id) {
+			if (dev_attr.orig_attr.vendor_part_id !=
+			    GDMA_DEVICE_MANA) {
+				DRV_LOG(INFO, "Skip device vendor part id %x",
+					dev_attr.orig_attr.vendor_part_id);
+				continue;
+			}
+			if (!dev_attr.raw_packet_caps) {
+				DRV_LOG(INFO,
+					"Skip device without RAW support");
+				continue;
+			}
+		}
+
 		for (port = 1; port <= dev_attr.orig_attr.phys_port_cnt;
 		     port++) {
 			struct rte_ether_addr addr;
diff --git a/drivers/net/mana/mana.h b/drivers/net/mana/mana.h
index 855d98911b..6309cae76b 100644
--- a/drivers/net/mana/mana.h
+++ b/drivers/net/mana/mana.h
@@ -12,6 +12,10 @@ struct mana_shared_data {
 	RTE_ATOMIC(uint32_t) secondary_cnt;
 };
 
+/* vendor_part_id returned from ibv_query_device */
+#define GDMA_DEVICE_MANA	2
+#define GDMA_DEVICE_MANA_IB	3
+
 #define MANA_MAX_MTU	9000
 #define MIN_RX_BUF_SIZE	1024
 #define MANA_MAX_MAC_ADDR 1
-- 
2.34.1